ASME B16.20 Metal Seal Spiral Wound Gasket

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Xiamen Qishine Imp. & Exp. Co., Ltd provides forged flanges with nominal diameter DN15 - DN3000 that suit for Europe, Germany, the United States, France, Britain, Italy, Russia, Japan and domestic chemical standards, EN, DIN, ASME, ANSI, BS, JIS, MSS, API,AWWA, Gost, GB and SAE. Non-standard flanges according to customers' drawings are available also. All our products  are made by ISO,PED, EC, EU and API approved manufacturers. Be rest assured about our products quality. And any third party inspection before delivery are welcome. 

Spiral Wound gaskets, ASME B16.20 Metal Gasket

The concept of spiral wound gasket construction was originated by Flexitallic in 1912, inaugurating the beginning of a new era in safe, effective sealing. The primary purpose for this development was the increasingly severe temperatures and pressures used by U.S. refinery operators in the first half of the century.

The necessity for a gasket to have the ability to recover cannot be over emphasized. The effects of pressure and temperature fluctuations, the temperature differential across the flange face, together with bolt stress relaxation and creep, demand a gasket with adequate flexibility and recovery to maintain a seal even under these varying service conditions. The Spiral Wound Gasket is the precision engineered solution to such problems, meeting the most exacting conditions of both temperature and pressure in flanged joints and similar assemblies and against virtually every known corrosive and toxic media.The spiral wound gasket meets the most exacting conditions of both temperature and pressure in flanged joints and similar assemblies and against every known corrosive and toxic media.

ASME B16.20 which covers spiral wound gaskets requires the use of solid metal inner rings in: Pressure Class 900, nominal pipe sizes 24 and larger, Pressure Class 1500 from nominal pipe sizes 12 and larger, Pressure Class 2500 from nominal pipe sizes 4 and larger and all PTFE filled gaskets. In the same standard is also described how a spiral wound gasket should be characterized, below you will find a image on it.

The ASME B16.20 Metal Seal Spiral Wound Gasket is a crucial component in various industrial applications, known for its excellent sealing performance, durability, and adaptability to various environmental conditions. This gasket plays a vital role in creating a tight seal between two mating surfaces, preventing the leakage of fluids or gases. The Spiral Wound Gasket has a unique design, consisting of alternating layers of metallic and filler materials. The metallic layer provides structural strength and resilience, while the filler material ensures effective sealing.

The American Society of Mechanical Engineers (ASME) has established comprehensive guidelines and requirements for the design, manufacture, and application of these gaskets in the ASME B16.20 standard. This standard provides essential information for manufacturers, engineers, and end-users, ensuring that Spiral Wound Gaskets adhere to stringent quality and performance benchmarks.

Key Components and Design Features

The ASME B16.20 Metal Seal Spiral Wound Gasket features a V-shaped metallic strip wound in a spiral pattern, with a soft filler material interleaved between the windings. This design allows the gasket to achieve a high degree of compression and recovery under varying load conditions. Moreover, the V-shaped profile ensures excellent sealing performance even under low bolt loads, making it suitable for use in high-pressure and high-temperature applications.

The metallic strip typically consists of materials like stainless steel, Inconel, Hastelloy, or Monel, chosen based on the specific requirements of the application. The filler materials can be graphite, PTFE, mica, or ceramic, again depending on the environmental conditions and compatibility with the media being sealed.

Engineering Cases and Applications

One notable engineering case involving the use of ASME B16.20 Metal Seal Spiral Wound Gaskets is the installation of these gaskets in the petrochemical industry. In this case, the gaskets were used to seal high-pressure steam and hydrocarbon systems, which demanded extreme temperature and pressure resistance. The Spiral Wound Gaskets proved to be an ideal solution, providing reliable sealing under demanding conditions and ensuring the safe operation of the plant.

Another engineering case includes the application of Spiral Wound Gaskets in nuclear power plants. These facilities require exceptional sealing performance to prevent the release of radioactive materials. In this instance, the ASME B16.20 Metal Seal Spiral Wound Gaskets were utilized in various connections, such as flanged joints, heat exchangers, and reactor vessels. The gaskets performed admirably, offering exceptional sealing performance and durability under challenging operating conditions.

Finally, Spiral Wound Gaskets have also found application in the food and beverage industry. In one engineering case, a major food processing plant employed these gaskets to seal steam and hot water connections in their piping systems. The ASME B16.20 Metal Seal Spiral Wound Gaskets provided reliable sealing and withstood the harsh cleaning agents used in the facility, ensuring product safety and maintaining high hygiene standards.

Conclusion

The ASME B16.20 Metal Seal Spiral Wound Gasket is a versatile and reliable sealing solution for a wide range of industrial applications. The unique design and material selection of these gaskets enable them to perform exceptionally well under various load conditions, temperature ranges, and chemical environments. Adhering to the ASME B16.20 standard ensures that manufacturers and end-users can trust the quality and performance of these gaskets. The engineering cases mentioned above demonstrate the reliability and practicality of Spiral Wound Gaskets in various industries, further solidifying their position as a premier sealing solution.